Neodymium Disc Strong Magnet – 3x2mm

The Neodymium Disc Strong Magnet (3x2mm) represents the pinnacle of magnetic technology, offering incredible holding power in an incredibly small package. Composed of Neodymium, Iron, and Boron (NdFeB), these magnets are part of the rare-earth family, making them the strongest permanent magnets commercially available. Despite their tiny 3mm diameter and 2mm thickness, they generate a surprisingly strong magnetic pull, which makes them indispensable for miniaturized electronic devices, precision mechanisms, and intricate crafting projects. Engineers and makers choose these powerful micro-magnets when both space and magnetic strength are non-negotiable requirements.

Key Features:

• Extreme Strength-to-Size Ratio: Despite being only 3x2mm, this magnet possesses superior magnetic force compared to conventional ceramic or ferrite magnets of a similar size.
• N35 Grade Magnetism: We rate this magnet at the standard N35 grade, which signifies a high energy product and reliable performance for general applications.
• Triple-Layer Coating: A durable Nickel-Copper-Nickel (Ni-Cu-Ni) coating protects the magnet from chipping and corrosion, significantly extending its lifespan.
• Small Disc Form Factor: The coin/disc shape makes it easy to integrate into drilled holes or small cavities in projects and enclosures.
• Permanent Magnetism: These magnets retain their magnetic field indefinitely, providing reliable, continuous force for long-term applications.

Technical Specifications:

• Material: Neodymium, Iron, Boron (NdFeB)
• Grade: N35
• Shape: Disc/Cylinder
• Coating: Ni-Cu-Ni (Nickel-Copper-Nickel)
• Maximum Operating Temperature: Typically 80°C (176°F)
• Magnetization Direction: Axially magnetized (poles are on the flat circular faces).

Mechanical Specifications:

• Tolerance: $\pm 0.1$ mm on diameter and thickness.
• Surface Finish: Smooth, shiny Nickel-plated finish.
• Mounting: Typically glued, embedded, or press-fit into materials.
• Warning: Handle with care; the strength can cause them to snap together quickly, posing a pinch hazard or risk of chipping.

Dimensions:

• Diameter (D): 3 mm
• Thickness (H): 2 mm

Pinout and Wiring:

• Note: As a permanent magnet, this component does not require any electrical power or wiring. Its strength is inherent to its material composition.
• Polarity: One flat face acts as the North pole, and the opposite flat face acts as the South pole. You determine the polarity using an external magnetic compass or another known magnet.
• Orientation Note: Pay close attention to the North/South orientation when installing multiple magnets to ensure they attract (opposite poles facing) or repel (like poles facing) as required by your application.

Datasheet Reference:

• Download Generic N35 Neodymium Datasheet

Commonly Used in:

• Precision Engineering: Hold small components in place in cameras, motors, and sensors.
• Model Making: Create invisible latching mechanisms or removable parts in scale models and miniatures.
• DIY Electronics: Activate reed switches or Hall effect sensors in contact-less sensing applications.

Applications:

• Magnetic Closures: Implement secure, invisible latches for small boxes, jewelry, or enclosure panels.
• Sensors and Switches: Utilize the magnetic field to trigger proximity sensors in door alarms or rotational counters.
• Micro-Motors and Actuators: Core components in the construction of small, efficient electric motors and linear actuators.
• Therapy and Jewelry: Integrate into magnetic jewelry and small, wearable devices.

Equivalent Models:

• 4x1mm Disc Magnet: Offers a larger surface area for better contact but sacrifices thickness.
• 2x2mm Disc Magnet: A smaller diameter magnet, sacrificing some pull force for a more compact size.
• N42 Grade Magnet: A higher magnetic grade (N42) of the same size, which provides stronger pull force but may be more brittle.

Package Includes:

• 1 x Neodymium Disc Strong Magnet – 3x2mm